@ OP: You actually want Airgunforums.ca for what you're looking for.
Airsoft = Horrible accuracy compared to pellet guns (4.5mm or .177 cal).
There's nothing wrong with doing both, you just need to ensure that you know that airsoft is meant for shooting safely at other people and pellet guns are meant for target practise (ie. ISSF)/vermin/pest control.
My KSC G19 shoots at a little under 325 FPS using .20's (last time I chronoed it, it was probably around 18-19 C ambient temp using propane).
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE